I have 1.28 build 132 of Shibby on my Netgear, and it's working pretty good as a printer and file server. I've had a separate router for my 4G stick, but it broke down the other day, so I figured I'll give it another shot with the tomato, as it says in the latest version that it explicitly supports my modem E398.
The good news is that a connection is established, the problem is that as soon as you start using it, it loses the connection (just a few MB can be transferred before manually having to renew the connection) .
What could be wrong in the settings? I've deselected support for 3g modem as that seems to prevent any connection at all. OHCI and UHCI is selected, aswell as USB 2.0 support.
Don't know what else could affect it?